Which of the following statements about an AS-External-LSA are true? (Choose three.)
A. The Link State ID field specifies the network segment address for an advertised destination.
B. The Advertising Router field specifies the Router ID of an ASBR.
C. The Net mask field specifies the network mask of an advertised destination.
D. The Link State ID and Advertising Router fields are used together to uniquely identify an AS-External-LS